The electron beam induced short lived absorption in PLZT optical ceramics

D. Millers , V. Dimza, L. Grigorjeva, M. Antonova, K. Smits, M. Livins

The short lived absorption induced by a pulsed electron beam in the led–lanthanum–zirconate–titanate
(PLZT) optical ceramics was studied. The measured absorption spectrum covers 1.1–2.9 eV energy range
and consists of several strongly overlapping peaks. The rise of the absorption is delayed with respect to
the excitation pulse, due to charge carrier migration before trapping at centers responsible for the
absorption. The formation rate of absorption centers and decay rate of absorption depend on the photon
energy. The kinetics of short lived absorption varies over spectrum and can be approximated with a
stretched exponent. The stretched exponent parameters indicate that the local disorder of a matrix is
similar around all absorption centers.

Optical Materials xxx (2013) xxx–xxx

DOI 10.1016/j.optmat.2012.12.029

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